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/*
* Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @key gc
* @bug 8114823
* @requires vm.gc == null
* @requires vm.opt.ExplicitGCInvokesConcurrent != true
* @requires vm.opt.ClassUnloading != true
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
*
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:-ClassUnloading -XX:+UseG1GC TestClassUnloadingDisabled
*
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:-ClassUnloading -XX:+UseSerialGC TestClassUnloadingDisabled
*
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:-ClassUnloading -XX:+UseParallelGC TestClassUnloadingDisabled
*
*/
/*
* @test
* @key gc
* @bug 8114823
* @comment Graal does not support CMS
* @requires vm.gc=="null" & !vm.graal.enabled
* @requires vm.opt.ExplicitGCInvokesConcurrent != true
* @requires vm.opt.ClassUnloading != true
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:-ClassUnloading -XX:+UseConcMarkSweepGC TestClassUnloadingDisabled
*/
/*
* @test TestClassUnloadingDisabledShenandoah
* @key gc
* @bug 8114823
* @comment Graal does not support Shenandoah
* @requires vm.gc.Shenandoah & !vm.graal.enabled
* @requires vm.opt.ExplicitGCInvokesConcurrent != true
* @requires vm.opt.ClassUnloading != true
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
* -XX:-ClassUnloading -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestClassUnloadingDisabled
*/
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import sun.hotspot.WhiteBox;
import static jdk.test.lib.Asserts.*;
public class TestClassUnloadingDisabled {
public static void main(String args[]) throws Exception {
final WhiteBox wb = WhiteBox.getWhiteBox();
// Fetch the dir where the test class and the class
// to be loaded resides.
String classDir = TestClassUnloadingDisabled.class.getProtectionDomain().getCodeSource().getLocation().getPath();
String className = "ClassToLoadUnload";
assertFalse(wb.isClassAlive(className), "Should not be loaded yet");
// The NoPDClassLoader handles loading classes in the test directory
// and loads them without a protection domain, which in some cases
// keeps the class live regardless of marking state.
NoPDClassLoader nopd = new NoPDClassLoader(classDir);
nopd.loadClass(className);
assertTrue(wb.isClassAlive(className), "Class should be loaded");
// Clear the class-loader, class and object references to make
// class unloading possible.
nopd = null;
System.gc();
assertTrue(wb.isClassAlive(className), "Class should not have ben unloaded");
}
}
class NoPDClassLoader extends ClassLoader {
String path;
NoPDClassLoader(String path) {
this.path = path;
}
public Class<?> loadClass(String name) throws ClassNotFoundException {
byte[] cls = null;
File f = new File(path,name + ".class");
// Delegate class loading if class not present in the given
// directory.
if (!f.exists()) {
return super.loadClass(name);
}
try {
Path path = Paths.get(f.getAbsolutePath());
cls = Files.readAllBytes(path);
} catch (IOException e) {
throw new ClassNotFoundException(name);
}
// Define class with no protection domain and resolve it.
return defineClass(name, cls, 0, cls.length, null);
}
}
class ClassToLoadUnload {
}
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